Dylan Fox is the founder and CEO of AssemblyAI, the voice AI infrastructure platform behind AI notetakers, medical scribes, drive through ordering, contact centers and humanoid robots. AssemblyAI went through Y Combinator's first AI batch in 2017 and now serves over 1 million developers with roughly 100 million API calls a day.

We get into the volume numbers, why weekly conversations are up over 800% in three years, the three macro trends pulling voice into everything, why coding agents turned small businesses into API customers, how data mixture drives 75% of model quality, the humanoid robot speaker problem, on device models, and the disclosure question the entire voice agent industry is avoiding.

"It's very easy to optimize for a public open source benchmark. It's very hard to optimize across all these real world applications."

We cover

› 120 million weekly conversations and 4x YouTube's daily voice volume

› Coding agents expanding the TAM by 100x

› Context aware voice models and the McDonald's ordering problem

› Why humanoid robots can't disambiguate speakers

› Whether voice agents should disclose they are AI

Sourcery: ⁠https://x.com/sourceryy

𝐄𝐏𝐈𝐒𝐎𝐃𝐄 𝐋𝐈𝐍𝐊

YouTube: https://youtu.be/xAF7HkX2DXI

𝐒𝐏𝐎𝐍𝐒𝐎𝐑𝐒

• Brex—The modern finance platform, combining the world’s smartest corporate card with integrated expense management, banking, bill pay, & travel. https://brex.com/sourcery

•MongoDB–Millions of developers and more than 65,200+ customers across industries, including ~75% of the Fortune 100, rely on MongoDB for their most important applications. With integrated capabilities for operational data, search, real-time analytics, & AI-powered data retrieval, MongoDB helps organizations everywhere move faster, innovate more efficiently, & simplify complex architectures. https://mongodb.com/ai

•AssemblyAI–Millions of developers use AssemblyAI to power their voice ai applications and features. One API gives you access to best-in-class speech-to-text, voice agent, and speech understanding models for both pre-recorded and real-time audio.  Granola, ClickUp & HeyGen are scaling with AssemblyAI - get $50 of free credits today at http://AssemblyAI.com/sourcery

𝐓𝐈𝐌𝐄𝐒𝐓𝐀𝐌𝐏𝐒

(00:00) Dylan Fox, Founder & CEO at Assembly AI

(01:06) AssemblyAI's voice traffic just beat YouTube by 4x

(03:33) $100K in GPU credits that started it all

(06:39) Why Voice AI is inflecting right now

(10:11) AssemblyAI's infrastructure-first strategy

(12:41) Handling 120 million weekly calls

(14:49) How AI agents are rewriting Internal Ops at AssemblyAI

(17:05) The Sovereign AI problem nobody's solved for voice

(18:26) Is the Keyboard and Mouse finally dying?

(22:33) The problem Humanoid Robotics hasn't solved yet

(25:14) The real problem behind translating languages

(29:27) Can AI actually talk to animals?

(31:24) The real reason Open-Source benchmarks lie to you

(34:20) Building websites in chat rooms as a kid

(36:48) On-Device AI models are about to change everything

(43:03) The people who shaped Dylan's career